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LibJS: Implement Temporal.Instant.fromEpochSeconds()

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This commit is contained in:
Linus Groh 2021-07-09 11:51:23 +01:00
parent 9c9813c312
commit 2401e45720
4 changed files with 81 additions and 0 deletions
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30
Userland/Libraries/LibJS/Runtime/Temporal/InstantConstructor.cpp
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@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCrypto/BigInt/UnsignedBigInteger.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Temporal/Instant.h>
#include <LibJS/Runtime/Temporal/InstantConstructor.h>
@ -25,6 +26,9 @@ void InstantConstructor::initialize(GlobalObject& global_object)
// 8.2.1 Temporal.Instant.prototype, https://tc39.es/proposal-temporal/#sec-temporal-instant-prototype
define_direct_property(vm.names.prototype, global_object.temporal_instant_prototype(), 0);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.fromEpochSeconds, from_epoch_seconds, 1, attr);
define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
}
@ -60,4 +64,30 @@ Value InstantConstructor::construct(FunctionObject& new_target)
return create_temporal_instant(global_object, *epoch_nanoseconds, &new_target);
}
// 8.2.3 Temporal.Instant.fromEpochSeconds ( epochSeconds ), https://tc39.es/proposal-temporal/#sec-temporal.instant.fromepochseconds
JS_DEFINE_NATIVE_FUNCTION(InstantConstructor::from_epoch_seconds)
{
// 1. Set epochSeconds to ? ToNumber(epochSeconds).
auto epoch_seconds_value = vm.argument(0).to_number(global_object);
if (vm.exception())
return {};
// 2. Set epochSeconds to ? NumberToBigInt(epochSeconds).
auto* epoch_seconds = number_to_bigint(global_object, epoch_seconds_value);
if (vm.exception())
return {};
// 3. Let epochNanoseconds be epochSeconds × 10^9ℤ.
auto* epoch_nanoseconds = js_bigint(vm.heap(), epoch_seconds->big_integer().multiplied_by(Crypto::UnsignedBigInteger { 1'000'000'000 }));
// 4. If ! IsValidEpochNanoseconds(epochNanoseconds) is false, throw a RangeError exception.
if (!is_valid_epoch_nanoseconds(*epoch_nanoseconds)) {
vm.throw_exception<RangeError>(global_object, ErrorType::TemporalInvalidEpochNanoseconds);
return {};
}
// 5. Return ? CreateTemporalInstant(epochNanoseconds).
return create_temporal_instant(global_object, *epoch_nanoseconds);
}
}